Employee Benefits - Contributions to Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015	Jan. 02, 2016
Defined Benefit Plan Disclosure [Line Items]
Employer contributions to employee benefit plans	$ 6	$ 4	$ 29	$ 21	$ 33
Total current year projected employer contributions			43
Pension
Defined Benefit Plan Disclosure [Line Items]
Employer contributions to employee benefit plans	3	1	18	11	19
Total current year projected employer contributions			28
Nonpension postretirement
Defined Benefit Plan Disclosure [Line Items]
Employer contributions to employee benefit plans	$ 3	$ 3	11	$ 10	$ 14
Total current year projected employer contributions			$ 15